Nissan Pathfinder. Manual - part 529

EC-422

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

COOLING FAN

3. Also check harness for short to ground.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK COOLING FAN RELAY

Check cooling fan relay. Refer to 

EC-424, "Component Inspection (Cooling Fan Relay)"

.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Replace cooling fan relay. Refer to 

PG-8, "Standardized Relay"

.

5.

CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check the continuity between cooling fan control nodule harness connector and ground.

3. Also check harness for short to power.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK COOLING FAN CONTROL SIGNAL CIRCUIT

1. Disconnect IPDM E/R harness connector.

2. Check the continuity between cooling fan control nodule harness connector and IPDM E/R harness con-

nector.

3. Also check harness for short to ground and to power.
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace error-detected parts.

7.

CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT

1. Reconnect all harness connectors disconnected.

2. Disconnect cooling fan control module harness connector.

3. Turn ignition switch ON.

4. Check the voltage between cooling fan control module terminals and ground.

+

−

Continuity

Cooling fan relay

IPDM E/R

Connector

Terminal

Connector

Terminal

E82

2

E119

27

Existed

+

−

Continuity

Cooling fan control module

Connector

Terminal

E225

1

Ground

Existed

+

−

Continuity

Cooling fan control module

IPDM E/R

Connector

Terminal

Connector

Terminal

E225

2

E218

93

Existed

COOLING FAN

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace error-detected parts.

8.

CHECK COOLING FAN MOTORS -1 AND -2

Check the cooling fan motor. Refer to 

EC-424, "Component Inspection (Cooling Fan Motor)"

.

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace cooling motor. Refer to 

CO-17, "Removal and Installation"

.

Component Inspection (Cooling Fan Motor)

INFOID:0000000009178352

1.

CHECK COOLING FAN MOTOR

1. Turn ignition switch OFF.

2. Disconnect cooling fan control module harness connector.

3. Supply cooling fan control module harness connector terminals with battery voltage as per the following,

and check operation.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning cooling fan motor. Refer to 

CO-17, "Removal and Installation"

.

Component Inspection (Cooling Fan Relay)

INFOID:0000000009178353

1.

CHECK COOLING FAN RELAY

1. Turn ignition switch OFF.

2. Remove cooling fan relay.

3. Check the continuity between cooling fan relay terminals under

the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace cooling fan relay.

+

−

Voltage

Cooling fan control module

Connector

Terminal

E245

4

Ground

Battery voltage

E246

6

Cooling fan control module

Operation

Motor

Connector

Terminal

+

−

1

E245

4

5

Cooling fan operates.

2

E246

6

7

Cooling fan relay

Conditions

Continuity

+

−

Terminal

3

5

12 V direct current supply between 
terminals  

and 

Existed

No current supply

Not existed

MBIB0057E

EC-424

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

ELECTRICAL LOAD SIGNAL

ELECTRICAL LOAD SIGNAL

Description

INFOID:0000000009178354

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via

the CAN communication.

Component Function Check

INFOID:0000000009178355

1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1. Turn ignition switch ON.

2. Connect CONSULT and select “DATA MONITOR” mode.

3. Select “LOAD SIGNAL” and check indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-425, "Diagnosis Procedure"

.

2.

CHECK LIGHTING SWITCH FUNCTION

Check “LOAD SIGNAL” indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Proceed to 

EC-425, "Diagnosis Procedure"

.

3.

CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select “HEATER FAN SW” and check indication under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-425, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178356

1.

INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to 

EC-425, "Compo-

nent Function Check"

.

Which circuit is related to the incident?

Rear window defogger>>GO TO 2.

Headlamp>>GO TO 3.

Heater fan>>GO TO 4.

2.

CHECK REAR WINDOW DEFOGGER SYSTEM

Check rear window defogger system. Refer to 

DEF-23, "Work Flow"

.

Monitor item

Condition

Indication

LOAD SIGNAL

Rear window defogger switch

ON

ON

OFF

OFF

Monitor item

Condition

Indication

LOAD SIGNAL

Lighting switch

ON at 2nd position

ON

OFF

OFF

Monitor item

Condition

Indication

HEATER FAN SW

Heater fan control switch

ON

ON

OFF

OFF

ELECTRICAL LOAD SIGNAL

EC-425

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>> INSPECTION END

3.

CHECK HEADLAMP SYSTEM

Check headlamp system. Refer to 

EXL-103, "Work Flow"

.

>> INSPECTION END

4.

CHECK HEATER FAN CONTROL SYSTEM

Check heater fan control system. Refer to 

VTL-7, "System Description"

.

>> INSPECTION END